166
FNCA52 TJSJ 311930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST SUN MAY 31 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-010800-
SOUTHEAST COASTAL PLAINS-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 10 10
TEMP (24H TREND) 72 (-3) 90 (+2) 73 91
RH % (24H TREND) 93 (-3) 54 (-9) 90 53
WIND 20FT/EARLY(MPH) E 11 E 14 E 13 E 18
WIND 20FT/LATE(MPH) E 10 SE 14 E 13 SE 17
MIXING HGT(FT-AGL/MSL) 4590 4730
TRANSPORT WND (MPH) SE 16 SE 20
VENT RATE (KT-FT) 64260 80410
DISPERSION 5 5
DSI 4 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-010800-
SOUTHERN HILLS-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 0 10 20
TEMP (24H TREND) 69 (-3) 87 (+3) 69 87
RH % (24H TREND) 98 (+1) 60 (-14) 96 58
WIND 20FT/EARLY(MPH) SE 9 E 11 SE 12 SE 14
WIND 20FT/LATE(MPH) E 9 SE 12 E 12 SE 14
MIXING HGT(FT-AGL/MSL) 5020 5050
TRANSPORT WND (MPH) SE 15 SE 20
VENT RATE (KT-FT) 65260 85850
DISPERSION 5 5
DSI 3 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-010800-
NORTH COASTAL PLAINS-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 10 0
TEMP (24H TREND) 72 (-2) 92 (+2) 71 91
RH % (24H TREND) 100 (+3) 54 (-14) 95 54
WIND 20FT/EARLY(MPH) SE 11 E 13 SE 13 SE 14
WIND 20FT/LATE(MPH) SE 9 E 17 SE 13 E 17
MIXING HGT(FT-AGL/MSL) 4850 5810
TRANSPORT WND (MPH) E 13 SE 17
VENT RATE (KT-FT) 53350 87150
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-010800-
NORTHERN HILLS-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 0 20 0 40
TEMP (24H TREND) 69 (-3) 90 (+1) 69 90
RH % (24H TREND) 100 (+2) 56 (-14) 96 53
WIND 20FT/EARLY(MPH) S 8 E 11 SE 10 SE 12
WIND 20FT/LATE(MPH) SE 6 E 14 SE 5 E 16
MIXING HGT(FT-AGL/MSL) 5580 6230
TRANSPORT WND (MPH) E 9 SE 16
VENT RATE (KT-FT) 44640 87220
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-010800-
WEST COAST-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 30 10 0 20
TEMP (24H TREND) 73 (-1) 92 (+2) 72 92
RH % (24H TREND) 99 (+3) 58 (-12) 94 54
WIND 20FT/EARLY(MPH) SE 12 E 13 SE 13 SE 19
WIND 20FT/LATE(MPH) E 12 SE 16 E 14 SE 18
MIXING HGT(FT-AGL/MSL) 4990 4990
TRANSPORT WND (MPH) SE 14 SE 20
VENT RATE (KT-FT) 59880 84830
DISPERSION 5 5
DSI 4 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-010800-
EASTERN INTERIOR-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 10 10
TEMP (24H TREND) 70 (-4) 89 (+3) 71 88
RH % (24H TREND) 99 (0) 58 (-13) 97 58
WIND 20FT/EARLY(MPH) SE 11 SE 12 SE 14 SE 16
WIND 20FT/LATE(MPH) SE 10 SE 14 SE 16 SE 16
MIXING HGT(FT-AGL/MSL) 5030 5360
TRANSPORT WND (MPH) SE 16 SE 20
VENT RATE (KT-FT) 70420 91120
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-010800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 10 10
TEMP (24H TREND) 68 (-4) 84 (+4) 69 83
RH % (24H TREND) 100 (0) 64 (-17) 98 65
WIND 20FT/EARLY(MPH) SE 10 SE 11 SE 12 SE 13
WIND 20FT/LATE(MPH) SE 9 SE 12 SE 13 SE 13
MIXING HGT(FT-AGL/MSL) 4190 4330
TRANSPORT WND (MPH) SE 17 SE 20
VENT RATE (KT-FT) 62850 73610
DISPERSION 5 5
DSI 4 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-010800-
CENTRAL MOUNTAIN RANGE-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 10 0 40
TEMP (24H TREND) 67 (-3) 88 (+5) 67 88
RH % (24H TREND) 100 (+2) 59 (-17) 99 57
WIND 20FT/EARLY(MPH) SE 5 SE 9 SE 9 SE 13
WIND 20FT/LATE(MPH) SE 6 SE 10 SE 9 SE 12
MIXING HGT(FT-AGL/MSL) 6240 5930
TRANSPORT WND (MPH) SE 10 SE 17
VENT RATE (KT-FT) 56160 88950
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-010800-
CAYEY MOUNTAIN RANGE-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 10 10
TEMP (24H TREND) 69 (-3) 83 (+2) 70 83
RH % (24H TREND) 100 (0) 65 (-15) 97 64
WIND 20FT/EARLY(MPH) SE 8 SE 11 SE 11 SE 12
WIND 20FT/LATE(MPH) E 8 SE 11 SE 11 SE 12
MIXING HGT(FT-AGL/MSL) 4420 4750
TRANSPORT WND (MPH) SE 16 SE 21
VENT RATE (KT-FT) 61880 85500
DISPERSION 5 5
DSI 3 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-010800-
VIEQUES-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY MCLEAR CLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 20 30 10 0
TEMP (24H TREND) 75 (-2) 88 (+1) 75 88
RH % (24H TREND) 89 (-6) 60 (-8) 88 60
WIND 20FT/EARLY(MPH) SE 13 SE 13 SE 17 SE 18
WIND 20FT/LATE(MPH) E 11 SE 14 SE 18 E 16
MIXING HGT(FT-AGL/MSL) 4040 3950
TRANSPORT WND (MPH) SE 20 SE 23
VENT RATE (KT-FT) 68680 79000
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-010800-
CULEBRA-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 10 10
TEMP (24H TREND) 76 (-2) 89 (+2) 77 89
RH % (24H TREND) 87 (-4) 58 (-12) 87 57
WIND 20FT/EARLY(MPH) SE 13 SE 14 SE 19 SE 18
WIND 20FT/LATE(MPH) E 12 SE 16 SE 19 E 16
MIXING HGT(FT-AGL/MSL) 3660 3530
TRANSPORT WND (MPH) SE 20 SE 23
VENT RATE (KT-FT) 62220 70600
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-010800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR CLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE SHOWERS
CHANCE PRECIP (%) 10 0 0 0
TEMP (24H TREND) 73 (-3) 92 (+3) 74 92
RH % (24H TREND) 95 (+3) 53 (-8) 90 51
WIND 20FT/EARLY(MPH) E 17 E 18 E 18 E 23
WIND 20FT/LATE(MPH) E 16 SE 20 E 20 SE 23
MIXING HGT(FT-AGL/MSL) 4870 4870
TRANSPORT WND (MPH) SE 18 SE 23
VENT RATE (KT-FT) 77920 97400
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-010800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 20 10 10 0
TEMP (24H TREND) 76 (-2) 86 (+1) 76 86
RH % (24H TREND) 89 (-5) 61 (-10) 88 62
WIND 20FT/EARLY(MPH) SE 14 SE 16 SE 20 SE 19
WIND 20FT/LATE(MPH) E 12 SE 16 SE 20 E 17
MIXING HGT(FT-AGL/MSL) 3550 3660
TRANSPORT WND (MPH) SE 20 E 21
VENT RATE (KT-FT) 60350 65880
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-010800-
ST CROIX-
330 PM AST SUN MAY 31 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 10 0 0
TEMP (24H TREND) 75 (-2) 87 (+1) 75 87
RH % (24H TREND) 90 (-5) 61 (-8) 87 61
WIND 20FT/EARLY(MPH) E 12 E 14 E 19 E 18
WIND 20FT/LATE(MPH) E 13 SE 14 E 19 E 17
MIXING HGT(FT-AGL/MSL) 4270 4710
TRANSPORT WND (MPH) SE 22 E 23
VENT RATE (KT-FT) 81130 94200
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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